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Note 6 - Earnings Per Share - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Basic earnings per share:        
Net income attributable to Common shareholders $ 804 $ (582) $ 2,534 $ 71
Diluted earnings per share:        
Net income attributable to Common shareholders $ 804 $ (582) $ 2,534 $ 71
Weighted average shares outstanding (in shares) 3,894,128 3,957,012 3,893,431 3,956,609
Basic earnings per common share (in dollars per share) $ 0.21 $ (0.15) $ 0.65 $ 0.02
Effect of potentially dilutive restricted common shares (in shares) 7,400 [1] 5,289 33,366
Weighted average diluted shares outstanding (in shares) 3,901,528 3,957,012 3,898,720 3,989,975
Diluted earnings per common share (in dollars per share) $ 0.21 $ (0.15) $ 0.65 $ 0.02
[1] There were 1,073 shares excluded from the calculation of diluted net loss per share due to their anti-dilutive effect for the three month period ended June 30, 2016.